When looking more closely however, at the word "Apollo", I don't like the breaks in the l's...they just don't look natural.

I have that identical photo, authentically signed by Shepard (that I picked up late last year from Gerry Montague), with the identical inscription. "Apollo" has no breaks in either l.

I don't know that this ebay photo is bad; it could just be that the pen slipped 2-4 times in rapid succession. It is enough though, when added to some other possible anomolies in the signature and inscription, to give me doubts.

liftoff1

It looks fine to me. I believe it was obtained via a private signing by Galaxy Space.

DChudwin

Looks good to me. The broken letters L in Apollo appears to be "normal" pen slips. The signature itself is quite typical.

eems

The signature looked good to me but I also haven't been studying as long as most people in the forum. I prefer items filtered by the eyes of Gerry, the Steve's, and the other reliable sources frequenting this forum but the tougher ones like Shepard on the moon I may have no choice but to brave the scary ebay waters at some point. Thanks.